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v J. B. PUWELL.

lSPRING MOTOR.

180.882.888. n y Patented May 8,1888.

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UNITED STATES PATENT GEEICE.

JOHN E. POWELL, OE PHILADELPHIA, PENNSYLVANIA, AssIGNOE OE ONE- FOURTH.fro DANIEL'P. DIETEEIOH AND RICHARD M. POPHAM, BOTH OE j SAME PLACE.

SPRING- SPECIFICATION forming part of Letters Patent No. 382,663I datedMay 8,1888.

Applicaion filed August 20, 1887. Serial No. 247.426. (No model.)

T all whom it may concern:

Be it known that I, JOHN B. POWELL, a citizen of Vthe United States, anda resident of Philadelphia, Pennsylvania, have invented certainImprovements in Spring Motors, of

which the following is a specification.

My invention relates to that class of springmotors in which a series ofsprings located one above another are employed, the objects of my Ioinvention being to simplify the construction of the motor and to reduceto a minimum the loss of power due to friction.

In the accompanying drawings, Figure 1 is a vertical section ofsufficient of a spring-motor to illustrate my invention; Fig. 2, asectional plan on the line 1,2, Fig. 1, omitting the spring; Fig. 3, asectional plan on theline 3 4, Fig. l; and Figs. 5, 6, 7, 8, and 9,detached views illustrating features of the invention. zo The Xed frameof the machine comprises a series of frames or spiders, B,carried byvertical bolts a, and separated by fillingepieces b, which serve tomaintain them at the proper distances apart. Each -of the spiders,except the top one, consists of ahub, d, a ring, f, and a series ofradial arms, g, the latter being trough-shaped, asshown in Fig, v7, forthe reception of rollers h, which directly support the springsD, asshown in Fig. l, each spring 3o being connected atv its inner end to oneof the sections F of the central hollow shaft or arbor of the machine,andlat its outer end toa cage, G, which is connected to and suspendedfrom the section of 'the arbor above it, and thus 3 5 forms,practically,v a angedextension of said arbor, so that the successivesections of the arbor may be said to be connected together through themedium of the springs.` Each arbor-section is adapted to a bearing inone of the spiders B, and has a flange or collar, i, bearing on the hubof said spider, except in the case of the topmost section, which issimply adapted to a bearing in the top spider, A,-

or it may also have a bearing-collar, if desired. As all of the springswind in the same direction, it will be seen that when power is appliedto the topmost section, F, of the arbor, to turn the same and cause theturning of the topmost cage, G, so as to wind up the spring the lowestsection ot' the arbor, and passes 6o` freely through the sections abovethe same.4 As the springs are supported solely by the' rollers h, thetops of which project above the tops ofthe radial arms ofthe spiders, asshowny in Fig. 7, very little friction is caused by :the

rotation of saidsprings and by the4 lateral l movement due to theexpansion and contrae tion of the same; and as the weight of each secr4tion of the arborand the cage carried thereby is borne, mainly, by thesprings to which said parts are connected, there is very little fric-ltion due to the bearing of the collars'z of the arbor-sections on thehubs of the spiders. .In fact, these collars may in some cases bedispensed with and the Weight` of the entire moving part of thestructure borne by the rollers h.

Each'roller has at the ends short journalsk adapted to recessesin thehub and rim of the` spider, the upper ends of the recesses being closedby suitable llingpieces, m, and the 8o troughs may be filled Vwith oil,so that' the surfaces of the rollers and their bearings will beconstantly lubricated.

When it is desired to compensate forthe difL ferences in the rate ofmovement of the difr ferent coils of the spring due to the differentdiameters of said coils, I use conical supporting-rollers h'such asshown iu Fig. 8, for' instance-in place of the cylindrical rollers shownin Figs. 1 tov 3, so that the supportinga surface of each coil of thespring moves at the same rate of speed as said coil when the spring isrotating.

There is alwaysa lateral pull upon each cage G at the point where thespring is attached to the same, and in order to prevent this fromcausingany lateral deflection Yof the cage and its arbor-sectioneesuchas would make thelatf ter bind in its bearing-I provide the cage, at oradjacent to the point at which the spring is connected thereto, with ananti-friction roller, n, which has a bearing upon the rim of the spiderbeneath the cage, and insures the concentricity of the cage with saidrim under all circumstances. As shown in Figs. 5 and 6, the roller n iscarried by the same pimp, to which the end plate, s, of the spring isattached, the rim of the spider being slightly less in diameter than thecage; but in Fig. 9 I have shown the roller n hung to an extension ofthelower bearing for the pin p-a plan which may be adopted when the rimof the spider is of the same or of greater diameter than the cage.

It will be evident that simple arms provided at their outer ends withmeans for the attachment of the outer ends of the springs thereto mayreplace' the cages G, if desired, and such arms are regarded as theequivalent of the cages.

I claim as my invention*n 1. The combination, in a spring-motor, of avseries of springs, located one above another, with a supporting-framehaving rollers upon which the springs are directly supported, allsubstantially as specified. p

2. rlhe combination of aseries of springs located one above another, anarbor composed of a series of sections connected together through themedium of the springs, and a sup porting-frame having rollers upon whichthe springs are directly supported, all substantially as specified.

3. The combination ofa series of springs located one above another, anarbor composed of a series of V sections connected together through themedium of the springs, andasupporting frame having conical rollers uponwhich the springs are directly supported, all substantially asspecified.

4. The combination of a series of springs located one above another, aframe having aseries of spiders, each carrying anti-friction rollersdirectly supporting the spring above it, and anarbor made in sectionsconnected together' through the medium of the springs, and each having aflange or collar bearing upon the hub of the spider, all substantiallyas specified.

5. The combination, in a springmotor, of a series of springs located oneabove another, a iiXed frame having annular bearing-rirns, a

.sectional arbor, and cages connected to the arbor-sections and to theouter ends of thesprings, and having adjacent to said spring-connectionsantifriction rollers having a lateral bean ing upon the annular rims ofthe xed frame, all substantially as specified.

6. The combination, in aspring-motor, of a series of springs located oneabove another, a series of supporting frames, each having trough shapedarms, and rollers mounted in said said trouglrshaped arms and directlysupporti-ng the springs, all substantially asset forth. f

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN g B. POWELL.

lVitnesses: i v

VILLIAM D. CONNER, HARRY SMITH.

